Walter scott and frank fenlet



(No Model.)

W. SCOTT & F. FENLEY.

STEAM ENGINE.

Patented Nov. 3, 1891.

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NrTnn STATES PATENT OFFICE.

\VAIIIER SCOT AND FRANK FENLEY, O1 I\E\V ORLEANS, LOUISIANA; SAID FENLEY ASSIGNOR TO SAID SCOT.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 462,593, dated November 3, 1891. Application filed April 21, 1891. Serial No. 389,872. (No model.)

To aZZ whom it may concern:

Be it known that we, \VALTER SCOTT and FRANK FENLEY, citizens of the United States, residing at New Orleans, in the parish of Or- 5 leansandStateofLouisiana,haveinventedcertain new and useful Improvements in Steam- ]Cngines; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in [O the art to which it appertains to make and use the same.

Our invention relates to an improvement in a telescope, steam, or other engine, and its novelty will be fully understood from the following description and claims when taken in connection with the annexed drawings; and the objects of on invention are to enable an engine to be operated with or without cylinder-heads in conjunction with three or more piston-heads placed within a cylindenthereby obtaining greater power with a less amount of steam and a reduction in the size of the engine that has heretofore been required to perform the same work. \Ve attain these ob jects by the mechanism illustrated in the ac com panyin g drawings, in which Figure 1 is a top View showing cylinder in section with heads in same, also pitman, cranks, cross-heads, and liy-wheel in position. Fig. 2 is a top view showing cylinder in section without heads, with cranks, pitman, and fly-wheel detached and relative position of cross-heads when pistons are in motion. Fig. 3 is a perspective side view of pistons.

Similar letters and figures refer to similar parts throughout the several views.

In the drawings, A refers to a steam-chest.

13 are rods which connect outer pistons (J and which pass loosely through center piston C and upon which. rods center pistons slide. The pistons G are placed atadistance apart of, say, two-thirds of the entire length of the cylinder and are attached to rods by nuts M, as shown in Fig. 2}.

D is a telescope piston-rod which takes loosely through the forward piston C and is attached to O and telescope cross-head E and through which interior pistoirrod F passes, the latter connecting the rear piston with interior piston-rod cross-head II.

G are coniiectingrods.

K are cranks.

I, is a fly or driving wheel.

P is a pitman.

Q are air-ports, which close when steam is 5 5 admitted, but which open when steam is shut off, thus preventinga vacuum in end of cylinder.

0 are cylinder-heads.

1, 2, 3, 4, and 5 are steam-ports, N showing end of cylinder without head.

In practice steam is admitted at port 1 in steam-chest and flows into port 2 of cylinder, piston C and piston C on the left of 6' being, say, one-fourth of an inch apart, said pistons occupying the position shown in Fig.

1, and when steam enters port 2 all three pistons move simultaneously, thus driving one of the pistons O to 3, piston C to 4, and piston O nearest cross-head to at, returningpistons when steam enters 4, and drives piston C nearest cr0ss-head to 5, C to 2, and piston O farthest from cross-head to 2, causing an exhaust at 2. The above movement can be made without cylinder-heads or a cylinder with heads with airports. Thus it will be seen that the movements of pistons U are controlled by interior piston-rod F and cross-head II, while piston C is controlled by telescope piston-rod D and cross-head l hthe cross-headsE So and II move back and forth in a slide, and when pistons are in motion the cross-heads E and ll are thrown in close proximity, as shown in Fig. 2, by movement of pitman connectingrods and rods D and F. \Vhen it is desired to increase power, steam is admitted at ports 3 and 5, our steam-chest being provided with two ports for admitting steam where cylinderheads are used, and the cylinder may also be provided with two ports for admitting steam into chest A where no heads are used in cylinder.

A striking advantage of our invention is its economical construction, easy manner by which power can be increased, and utilization 5 of exhaust-steam.

Having described our invention, what we claim, and desire to secure by Letters Patent,

In a multiple-piston engine,the combination, I00 with a piston-cylinder having air valves or ports in its rear and forward heads, a steamchest, and the ports 2, 3, 4, and 5 between the ing, a cross-head connected to the solid pistonchest and the cylinder, of two pistons arrod and also adapted to slidein the casing, and ranged in the cylinder and connected by lonpitman-rods connecting the cross-heads with 15 gitudinal rods, a piston arranged intermea rotatable crank-shaft, substantially as and diate of the connected pistons and adapted for the purpose specified.

to slide upon the connecting-rods thereof, a In testimony whereof We affix oursignatures hollow piston-rod taking loosely through the in presence of two Witnesses.

forward piston and connected to the interme- WALTER SCOTT. diate piston, a piston-rod taking through the FRANK FENLEY. hollow rod and connected to the rear piston, a Witnesses:

slide-casing, a cross-head connected to the hol- J'IELMUTH I-IOLTZ,

low piston-rod and adapted to slide in the cas- PERCY D. PARKS. 

